Multithreading with multimedia timer

#include <stdio.h>
#include <windows.h>
#include <mmsystem.h>
#include <process.h> 
#include <fstream>
#include <iostream>
#include <math.h>

#define EVENT_NUM 4
#define TARGET_RESOLUTION 1
#define MAX_ELEMENT 1000000
#define TMR_INTERVAL_MS 1
#define MAX_LOOP 5
#define TIME_BEFORE_START 10

//struch for each Core
typedef struct {
	HANDLE gDoneEvent;
	HANDLE hTimer ;
	HANDLE hTimerQueue;
	int cnt;
}process;

DWORD WINAPI ThreadRunAtCoreX( int arg );
int myPow(double base,int exp);
void setResolution();
unsigned __int64 getFreq();

//use for convert tick to ns
long double factor = 0;

//data storage in each core
process core[4];

//use for Timer resolution
TIMECAPS tc;
UINT wTimerRes;


VOID CALLBACK TimerRoutine(BOOLEAN TimerOrWaitFired,int arg)
{
	printf("args : %d\n",arg);
	//printf("Routine[%d] cnt:%d\n",arg,core[arg].cnt);
	if(core[arg].cnt++ >=MAX_LOOP)
		SetEvent(core[arg].gDoneEvent);
	
}

int main()
{
	//variable for thread handler
	HANDLE hThread[EVENT_NUM]; 
    DWORD ThreadIDCore[EVENT_NUM]; 
	
	//set mmtimer Resolution
	setResolution();

	//create thread 
	for(int i=0;i<EVENT_NUM;i++)
	{
	hThread[i] = CreateThread(	NULL,					0,
					(LPTHREAD_START_ROUTINE)ThreadRunAtCoreX,
					(LPVOID )i,
					0,
					&ThreadIDCore[i]);
	}
	if(WaitForMultipleObjects(EVENT_NUM,hThread,TRUE,INFINITE)==WAIT_FAILED)
		printf("Waiting failed, error %d...\n", GetLastError()); 

	printf("All thread finished\n");
	for(int i=0;i<EVENT_NUM;i++)
	{
		if(CloseHandle(hThread[i])!=0)
		{
			printf("Close thread[i] successfull\n",i);
		}
		else
		{
			printf("Fail to close thread[i], Error(%u)\n",GetLastError());
		}
	}
	getchar();	
	return 0;
}

DWORD WINAPI ThreadRunAtCoreX( int arg )
{
	core[arg].gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

	core[arg].hTimerQueue = CreateTimerQueue();

	if (!CreateTimerQueueTimer( &core[arg].hTimer,	//timer buffer
				    core[arg].hTimerQueue,	//timer
				    //call back rutine
				    (WAITORTIMERCALLBACK)TimerRoutine, 
				(PVOID)arg ,		//arg passing
				TIME_BEFORE_START,	//time before start(ms)
				TMR_INTERVAL_MS,//timer interval
				0))	//default timer
    {
        printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
     }
	if (WaitForSingleObject(core[arg].gDoneEvent, INFINITE) != WAIT_OBJECT_0)
		printf("WaitForSingleObject failed (%d)\n", GetLastError());
	//close event handler
	CloseHandle(core[arg].gDoneEvent);
	//delete timer
	if (!DeleteTimerQueue(core[arg].hTimerQueue))
			printf("DeleteTimerQueue failed (%d)\n", GetLastError());
	printf("Thread[%d] Completed\n",arg);
    return 0;
}

/*
	must import winmm.lib in to project using
	Project > ProjectName Properties(Alt+F7)
	Configulation properties > Linker > Input > 
	additional dependency > add "winmm.lib;"
*/
void setResolution()
{
	//get timer resolution
	if (timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR) 
	{
		printf("TimeGetDevCaps Error \n");
	}
	//get max resolution
	wTimerRes = min(max(tc.wPeriodMin, TARGET_RESOLUTION), tc.wPeriodMax);
	//set max resolution
	timeBeginPeriod(wTimerRes); 
}